parallel.apps.ipclusterapp

Module: parallel.apps.ipclusterapp

Inheritance diagram for IPython.parallel.apps.ipclusterapp:

The ipcluster application.

Authors:

• Brian Granger
• MinRK

Classes

IPClusterApp

class IPython.parallel.apps.ipclusterapp.IPClusterApp(**kwargs)

Bases: IPython.config.application.Application

__init__(**kwargs)

aliases

An instance of a Python dict.

classmethod class_config_section()

Get the config class config section

classmethod class_get_help(inst=None)

Get the help string for this class in ReST format.

If inst is given, it’s current trait values will be used in place of class defaults.

classmethod class_get_trait_help(trait, inst=None)

Get the help string for a single trait.

If inst is given, it’s current trait values will be used in place of the class default.

classmethod class_print_help(inst=None)

Get the help string for a single trait and print it.

classmethod class_trait_names(**metadata)

Get a list of all the names of this classes traits.

This method is just like the trait_names() method, but is unbound.

classmethod class_traits(**metadata)

Get a list of all the traits of this class.

This method is just like the traits() method, but is unbound.

The TraitTypes returned don’t know anything about the values that the various HasTrait’s instances are holding.

This follows the same algorithm as traits does and does not allow for any simple way of specifying merely that a metadata name exists, but has any value. This is because get_metadata returns None if a metadata key doesn’t exist.

classes

An instance of a Python list.

classmethod clear_instance()

unset _instance for this class and singleton parents.

config

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

created = None

description = "Start an IPython cluster for parallel computing.\n\nAn IPython cluster consists of 1 controller and 1 or more engines.\nThis command automates the startup of these processes using a wide\nrange of startup methods (SSH, local processes, PBS, mpiexec,\nWindows HPC Server 2008). To start a cluster with 4 engines on your\nlocal host simply do 'ipcluster start --n=4'. For more complex usage\nyou will typically do 'ipython profile create mycluster --parallel', then edit\nconfiguration files, followed by 'ipcluster start --profile=mycluster --n=4'.\n"

examples = '\nipcluster start --n=4 # start a 4 node cluster on localhost\nipcluster start -h # show the help string for the start subcmd\n\nipcluster stop -h # show the help string for the stop subcmd\nipcluster engines -h # show the help string for the engines subcmd\n'

exit(exit_status=0)

extra_args

An instance of a Python list.

flags

An instance of a Python dict.

flatten_flags()

flatten flags and aliases, so cl-args override as expected.

This prevents issues such as an alias pointing to InteractiveShell, but a config file setting the same trait in TerminalInteraciveShell getting inappropriate priority over the command-line arg.

Only aliases with exactly one descendent in the class list will be promoted.

generate_config_file()

generate default config file from Configurables

initialize(argv=None)

Do the basic steps to configure me.

Override in subclasses.

initialize_subcommand(subc, argv=None)

Initialize a subcommand with argv.

classmethod initialized()

Has an instance been created?

classmethod instance(*args, **kwargs)

Returns a global instance of this class.

This method create a new instance if none have previously been created and returns a previously created instance is one already exists.

The arguments and keyword arguments passed to this method are passed on to the __init__() method of the class upon instantiation.

Examples

Create a singleton class using instance, and retrieve it:

>>> from IPython.config.configurable import SingletonConfigurable
>>> class Foo(SingletonConfigurable): pass
>>> foo = Foo.instance()
>>> foo == Foo.instance()
True

Create a subclass that is retrived using the base class instance:

>>> class Bar(SingletonConfigurable): pass
>>> class Bam(Bar): pass
>>> bam = Bam.instance()
>>> bam == Bar.instance()
True

keyvalue_description

A trait for unicode strings.

load_config_file(filename, path=None)

Load a .py based config file by filename and path.

log

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

log_format

A trait for unicode strings.

log_level

An enum that whose value must be in a given sequence.

name = u'ipcluster'

on_trait_change(handler, name=None, remove=False)

Setup a handler to be called when a trait changes.

This is used to setup dynamic notifications of trait changes.

Static handlers can be created by creating methods on a HasTraits subclass with the naming convention ‘_[traitname]_changed’. Thus, to create static handler for the trait ‘a’, create the method _a_changed(self, name, old, new) (fewer arguments can be used, see below).

Parameters :

handler : callable

A callable that is called when a trait changes. Its signature can be handler(), handler(name), handler(name, new) or handler(name, old, new).

name : list, str, None

If None, the handler will apply to all traits. If a list of str, handler will apply to all names in the list. If a str, the handler will apply just to that name.

remove : bool

If False (the default), then install the handler. If True then unintall it.

option_description

A trait for unicode strings.

parse_command_line(argv=None)

Parse the command line arguments.

print_alias_help()

Print the alias part of the help.

print_description()

Print the application description.

print_examples()

Print usage and examples.

This usage string goes at the end of the command line help string and should contain examples of the application’s usage.

print_flag_help()

Print the flag part of the help.

print_help(classes=False)

Print the help for each Configurable class in self.classes.

If classes=False (the default), only flags and aliases are printed.

print_options()

print_subcommands()

Print the subcommand part of the help.

print_version()

Print the version string.

start()

subapp

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

subcommand_description

A trait for unicode strings.

subcommands = {'start': ('IPython.parallel.apps.ipclusterapp.IPClusterStart', "Start an IPython cluster for parallel computing\n\nStart an ipython cluster by its profile name or cluster\ndirectory. Cluster directories contain configuration, log and\nsecurity related files and are named using the convention\n'profile_<name>' and should be creating using the 'start'\nsubcommand of 'ipcluster'. If your cluster directory is in\nthe cwd or the ipython directory, you can simply refer to it\nusing its profile name, 'ipcluster start --n=4 --profile=<profile>`,\notherwise use the 'profile-dir' option.\n"), 'stop': ('IPython.parallel.apps.ipclusterapp.IPClusterStop', "Stop a running IPython cluster\n\nStop a running ipython cluster by its profile name or cluster\ndirectory. Cluster directories are named using the convention\n'profile_<name>'. If your cluster directory is in\nthe cwd or the ipython directory, you can simply refer to it\nusing its profile name, 'ipcluster stop --profile=<profile>`, otherwise\nuse the '--profile-dir' option.\n"), 'engines': ('IPython.parallel.apps.ipclusterapp.IPClusterEngines', "Start engines connected to an existing IPython cluster\n\nStart one or more engines to connect to an existing Cluster\nby profile name or cluster directory.\nCluster directories contain configuration, log and\nsecurity related files and are named using the convention\n'profile_<name>' and should be creating using the 'start'\nsubcommand of 'ipcluster'. If your cluster directory is in\nthe cwd or the ipython directory, you can simply refer to it\nusing its profile name, 'ipcluster engines --n=4 --profile=<profile>`,\notherwise use the 'profile-dir' option.\n")}

trait_metadata(traitname, key)

Get metadata values for trait by key.

trait_names(**metadata)

Get a list of all the names of this classes traits.

traits(**metadata)

Get a list of all the traits of this class.

The TraitTypes returned don’t know anything about the values that the various HasTrait’s instances are holding.

This follows the same algorithm as traits does and does not allow for any simple way of specifying merely that a metadata name exists, but has any value. This is because get_metadata returns None if a metadata key doesn’t exist.

update_config(config)

Fire the traits events when the config is updated.

version

A trait for unicode strings.

IPClusterEngines

class IPython.parallel.apps.ipclusterapp.IPClusterEngines(**kwargs)

Bases: IPython.parallel.apps.baseapp.BaseParallelApplication

__init__(**kwargs)

aliases

An instance of a Python dict.

auto_create

A boolean (True, False) trait.

build_launcher(clsname, kind=None)

import and instantiate a Launcher based on importstring

builtin_profile_dir

A trait for unicode strings.

check_pid(pid)

classmethod class_config_section()

Get the config class config section

classmethod class_get_help(inst=None)

Get the help string for this class in ReST format.

If inst is given, it’s current trait values will be used in place of class defaults.

classmethod class_get_trait_help(trait, inst=None)

Get the help string for a single trait.

If inst is given, it’s current trait values will be used in place of the class default.

classmethod class_print_help(inst=None)

Get the help string for a single trait and print it.

classmethod class_trait_names(**metadata)

Get a list of all the names of this classes traits.

This method is just like the trait_names() method, but is unbound.

classmethod class_traits(**metadata)

Get a list of all the traits of this class.

This method is just like the traits() method, but is unbound.

The TraitTypes returned don’t know anything about the values that the various HasTrait’s instances are holding.

This follows the same algorithm as traits does and does not allow for any simple way of specifying merely that a metadata name exists, but has any value. This is because get_metadata returns None if a metadata key doesn’t exist.

classes

An instance of a Python list.

clean_logs

A boolean (True, False) trait.

classmethod clear_instance()

unset _instance for this class and singleton parents.

cluster_id

A trait for unicode strings.

config

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

config_file_name

A trait for unicode strings.

config_file_paths

An instance of a Python list.

config_file_specified

A boolean (True, False) trait.

config_files

An instance of a Python list.

copy_config_files

A boolean (True, False) trait.

crash_handler_class

alias of ParallelCrashHandler

created = None

daemonize

A boolean (True, False) trait.

default_log_level = 20

description = "Start engines connected to an existing IPython cluster\n\nStart one or more engines to connect to an existing Cluster\nby profile name or cluster directory.\nCluster directories contain configuration, log and\nsecurity related files and are named using the convention\n'profile_<name>' and should be creating using the 'start'\nsubcommand of 'ipcluster'. If your cluster directory is in\nthe cwd or the ipython directory, you can simply refer to it\nusing its profile name, 'ipcluster engines --n=4 --profile=<profile>`,\notherwise use the 'profile-dir' option.\n"

early_shutdown

An integer trait.

Longs that are unnecessary (<= sys.maxint) are cast to ints.

engine_launcher

engine_launcher_class

A string holding a valid dotted object name in Python, such as A.b3._c

engines_started_ok()

engines_stopped(r)

engines_stopped_early(r)

examples = '\nipcluster engines --profile=mycluster --n=4 # start 4 engines only\n'

excepthook(etype, evalue, tb)

this is sys.excepthook after init_crashhandler

set self.verbose_crash=True to use our full crashhandler, instead of a regular traceback with a short message (crash_handler_lite)

exit(exit_status=0)

extra_args

An instance of a Python list.

flags

An instance of a Python dict.

flatten_flags()

flatten flags and aliases, so cl-args override as expected.

This prevents issues such as an alias pointing to InteractiveShell, but a config file setting the same trait in TerminalInteraciveShell getting inappropriate priority over the command-line arg.

Only aliases with exactly one descendent in the class list will be promoted.

generate_config_file()

generate default config file from Configurables

get_pid_from_file()

Get the pid from the pid file.

If the pid file doesn’t exist a PIDFileError is raised.

init_config_files()

[optionally] copy default config files into profile dir.

init_crash_handler()

Create a crash handler, typically setting sys.excepthook to it.

init_launchers()

init_profile_dir()

initialize the profile dir

init_signal()

initialize(argv=None)

initialize_subcommand(subc, argv=None)

Initialize a subcommand with argv.

classmethod initialized()

Has an instance been created?

classmethod instance(*args, **kwargs)

Returns a global instance of this class.

This method create a new instance if none have previously been created and returns a previously created instance is one already exists.

The arguments and keyword arguments passed to this method are passed on to the __init__() method of the class upon instantiation.

Examples

Create a singleton class using instance, and retrieve it:

>>> from IPython.config.configurable import SingletonConfigurable
>>> class Foo(SingletonConfigurable): pass
>>> foo = Foo.instance()
>>> foo == Foo.instance()
True

Create a subclass that is retrived using the base class instance:

>>> class Bar(SingletonConfigurable): pass
>>> class Bam(Bar): pass
>>> bam = Bam.instance()
>>> bam == Bar.instance()
True

ipython_dir

A trait for unicode strings.

keyvalue_description

A trait for unicode strings.

load_config_file(suppress_errors=True)

Load the config file.

By default, errors in loading config are handled, and a warning printed on screen. For testing, the suppress_errors option is set to False, so errors will make tests fail.

log

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

log_format

A trait for unicode strings.

log_level

An enum that whose value must be in a given sequence.

log_to_file

A boolean (True, False) trait.

log_url

A trait for unicode strings.

loop

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

n

An integer trait.

Longs that are unnecessary (<= sys.maxint) are cast to ints.

name = u'ipcluster'

on_trait_change(handler, name=None, remove=False)

Setup a handler to be called when a trait changes.

This is used to setup dynamic notifications of trait changes.

Static handlers can be created by creating methods on a HasTraits subclass with the naming convention ‘_[traitname]_changed’. Thus, to create static handler for the trait ‘a’, create the method _a_changed(self, name, old, new) (fewer arguments can be used, see below).

Parameters :

handler : callable

A callable that is called when a trait changes. Its signature can be handler(), handler(name), handler(name, new) or handler(name, old, new).

name : list, str, None

If None, the handler will apply to all traits. If a list of str, handler will apply to all names in the list. If a str, the handler will apply just to that name.

remove : bool

If False (the default), then install the handler. If True then unintall it.

option_description

A trait for unicode strings.

overwrite

A boolean (True, False) trait.

parse_command_line(argv=None)

Parse the command line arguments.

print_alias_help()

Print the alias part of the help.

print_description()

Print the application description.

print_examples()

Print usage and examples.

This usage string goes at the end of the command line help string and should contain examples of the application’s usage.

print_flag_help()

Print the flag part of the help.

print_help(classes=False)

Print the help for each Configurable class in self.classes.

If classes=False (the default), only flags and aliases are printed.

print_options()

print_subcommands()

Print the subcommand part of the help.

print_version()

Print the version string.

profile

A trait for unicode strings.

reinit_logging()

remove_pid_file()

Remove the pid file.

This should be called at shutdown by registering a callback with reactor.addSystemEventTrigger(). This needs to return None.

sigint_handler(signum, frame)

stage_default_config_file()

auto generate default config file, and stage it into the profile.

start()

Start the app for the engines subcommand.

start_engines()

start_logging()

stop_engines()

stop_launchers(r=None)

subapp

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

subcommand_description

A trait for unicode strings.

subcommands

An instance of a Python dict.

to_work_dir()

trait_metadata(traitname, key)

Get metadata values for trait by key.

trait_names(**metadata)

Get a list of all the names of this classes traits.

traits(**metadata)

Get a list of all the traits of this class.

The TraitTypes returned don’t know anything about the values that the various HasTrait’s instances are holding.

This follows the same algorithm as traits does and does not allow for any simple way of specifying merely that a metadata name exists, but has any value. This is because get_metadata returns None if a metadata key doesn’t exist.

update_config(config)

Fire the traits events when the config is updated.

usage = None

verbose_crash

A boolean (True, False) trait.

version

A trait for unicode strings.

work_dir

A trait for unicode strings.

write_pid_file(overwrite=False)

Create a .pid file in the pid_dir with my pid.

This must be called after pre_construct, which sets self.pid_dir. This raises PIDFileError if the pid file exists already.

IPClusterStart

class IPython.parallel.apps.ipclusterapp.IPClusterStart(**kwargs)

Bases: IPython.parallel.apps.ipclusterapp.IPClusterEngines

__init__(**kwargs)

aliases

An instance of a Python dict.

auto_create

A boolean (True, False) trait.

build_launcher(clsname, kind=None)

import and instantiate a Launcher based on importstring

builtin_profile_dir

A trait for unicode strings.

check_pid(pid)

classmethod class_config_section()

Get the config class config section

classmethod class_get_help(inst=None)

Get the help string for this class in ReST format.

If inst is given, it’s current trait values will be used in place of class defaults.

classmethod class_get_trait_help(trait, inst=None)

Get the help string for a single trait.

If inst is given, it’s current trait values will be used in place of the class default.

classmethod class_print_help(inst=None)

Get the help string for a single trait and print it.

classmethod class_trait_names(**metadata)

Get a list of all the names of this classes traits.

This method is just like the trait_names() method, but is unbound.

classmethod class_traits(**metadata)

Get a list of all the traits of this class.

This method is just like the traits() method, but is unbound.

The TraitTypes returned don’t know anything about the values that the various HasTrait’s instances are holding.

This follows the same algorithm as traits does and does not allow for any simple way of specifying merely that a metadata name exists, but has any value. This is because get_metadata returns None if a metadata key doesn’t exist.

classes

An instance of a Python list.

clean_logs

A boolean (True, False) trait.

classmethod clear_instance()

unset _instance for this class and singleton parents.

cluster_id

A trait for unicode strings.

config

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

config_file_name

A trait for unicode strings.

config_file_paths

An instance of a Python list.

config_file_specified

A boolean (True, False) trait.

config_files

An instance of a Python list.

controller_launcher

controller_launcher_class

A string holding a valid dotted object name in Python, such as A.b3._c

copy_config_files

A boolean (True, False) trait.

crash_handler_class

alias of ParallelCrashHandler

created = None

daemonize

A boolean (True, False) trait.

default_log_level = 20

delay

A casting version of the float trait.

description = "Start an IPython cluster for parallel computing\n\nStart an ipython cluster by its profile name or cluster\ndirectory. Cluster directories contain configuration, log and\nsecurity related files and are named using the convention\n'profile_<name>' and should be creating using the 'start'\nsubcommand of 'ipcluster'. If your cluster directory is in\nthe cwd or the ipython directory, you can simply refer to it\nusing its profile name, 'ipcluster start --n=4 --profile=<profile>`,\notherwise use the 'profile-dir' option.\n"

early_shutdown

An integer trait.

Longs that are unnecessary (<= sys.maxint) are cast to ints.

engine_launcher

engine_launcher_class

A string holding a valid dotted object name in Python, such as A.b3._c

engines_started_ok()

engines_stopped(r)

prevent parent.engines_stopped from stopping everything on engine shutdown

engines_stopped_early(r)

examples = '\nipython profile create mycluster --parallel # create mycluster profile\nipcluster start --profile=mycluster --n=4 # start mycluster with 4 nodes\n'

excepthook(etype, evalue, tb)

this is sys.excepthook after init_crashhandler

set self.verbose_crash=True to use our full crashhandler, instead of a regular traceback with a short message (crash_handler_lite)

exit(exit_status=0)

extra_args

An instance of a Python list.

flags

An instance of a Python dict.

flatten_flags()

flatten flags and aliases, so cl-args override as expected.

This prevents issues such as an alias pointing to InteractiveShell, but a config file setting the same trait in TerminalInteraciveShell getting inappropriate priority over the command-line arg.

Only aliases with exactly one descendent in the class list will be promoted.

generate_config_file()

generate default config file from Configurables

get_pid_from_file()

Get the pid from the pid file.

If the pid file doesn’t exist a PIDFileError is raised.

init_config_files()

[optionally] copy default config files into profile dir.

init_crash_handler()

Create a crash handler, typically setting sys.excepthook to it.

init_launchers()

init_profile_dir()

initialize the profile dir

init_signal()

initialize(argv=None)

initialize_subcommand(subc, argv=None)

Initialize a subcommand with argv.

classmethod initialized()

Has an instance been created?

classmethod instance(*args, **kwargs)

Returns a global instance of this class.

This method create a new instance if none have previously been created and returns a previously created instance is one already exists.

The arguments and keyword arguments passed to this method are passed on to the __init__() method of the class upon instantiation.

Examples

Create a singleton class using instance, and retrieve it:

>>> from IPython.config.configurable import SingletonConfigurable
>>> class Foo(SingletonConfigurable): pass
>>> foo = Foo.instance()
>>> foo == Foo.instance()
True

Create a subclass that is retrived using the base class instance:

>>> class Bar(SingletonConfigurable): pass
>>> class Bam(Bar): pass
>>> bam = Bam.instance()
>>> bam == Bar.instance()
True

ipython_dir

A trait for unicode strings.

keyvalue_description

A trait for unicode strings.

load_config_file(suppress_errors=True)

Load the config file.

By default, errors in loading config are handled, and a warning printed on screen. For testing, the suppress_errors option is set to False, so errors will make tests fail.

log

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

log_format

A trait for unicode strings.

log_level

An enum that whose value must be in a given sequence.

log_to_file

A boolean (True, False) trait.

log_url

A trait for unicode strings.

loop

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

n

An integer trait.

Longs that are unnecessary (<= sys.maxint) are cast to ints.

name = u'ipcluster'

on_trait_change(handler, name=None, remove=False)

Setup a handler to be called when a trait changes.

This is used to setup dynamic notifications of trait changes.

Static handlers can be created by creating methods on a HasTraits subclass with the naming convention ‘_[traitname]_changed’. Thus, to create static handler for the trait ‘a’, create the method _a_changed(self, name, old, new) (fewer arguments can be used, see below).

Parameters :

handler : callable

A callable that is called when a trait changes. Its signature can be handler(), handler(name), handler(name, new) or handler(name, old, new).

name : list, str, None

If None, the handler will apply to all traits. If a list of str, handler will apply to all names in the list. If a str, the handler will apply just to that name.

remove : bool

If False (the default), then install the handler. If True then unintall it.

option_description

A trait for unicode strings.

overwrite

A boolean (True, False) trait.

parse_command_line(argv=None)

Parse the command line arguments.

print_alias_help()

Print the alias part of the help.

print_description()

Print the application description.

print_examples()

Print usage and examples.

This usage string goes at the end of the command line help string and should contain examples of the application’s usage.

print_flag_help()

Print the flag part of the help.

print_help(classes=False)

Print the help for each Configurable class in self.classes.

If classes=False (the default), only flags and aliases are printed.

print_options()

print_subcommands()

Print the subcommand part of the help.

print_version()

Print the version string.

profile

A trait for unicode strings.

reinit_logging()

remove_pid_file()

Remove the pid file.

This should be called at shutdown by registering a callback with reactor.addSystemEventTrigger(). This needs to return None.

reset

A boolean (True, False) trait.

sigint_handler(signum, frame)

stage_default_config_file()

auto generate default config file, and stage it into the profile.

start()

Start the app for the start subcommand.

start_controller()

start_engines()

start_logging()

stop_controller()

stop_engines()

stop_launchers(r=None)

subapp

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

subcommand_description

A trait for unicode strings.

subcommands

An instance of a Python dict.

to_work_dir()

trait_metadata(traitname, key)

Get metadata values for trait by key.

trait_names(**metadata)

Get a list of all the names of this classes traits.

traits(**metadata)

Get a list of all the traits of this class.

The TraitTypes returned don’t know anything about the values that the various HasTrait’s instances are holding.

This follows the same algorithm as traits does and does not allow for any simple way of specifying merely that a metadata name exists, but has any value. This is because get_metadata returns None if a metadata key doesn’t exist.

update_config(config)

Fire the traits events when the config is updated.

usage = None

verbose_crash

A boolean (True, False) trait.

version

A trait for unicode strings.

work_dir

A trait for unicode strings.

write_pid_file(overwrite=False)

Create a .pid file in the pid_dir with my pid.

This must be called after pre_construct, which sets self.pid_dir. This raises PIDFileError if the pid file exists already.

IPClusterStop

class IPython.parallel.apps.ipclusterapp.IPClusterStop(**kwargs)

Bases: IPython.parallel.apps.baseapp.BaseParallelApplication

__init__(**kwargs)

aliases

An instance of a Python dict.

auto_create

A boolean (True, False) trait.

builtin_profile_dir

A trait for unicode strings.

check_pid(pid)

classmethod class_config_section()

Get the config class config section

classmethod class_get_help(inst=None)

Get the help string for this class in ReST format.

If inst is given, it’s current trait values will be used in place of class defaults.

classmethod class_get_trait_help(trait, inst=None)

Get the help string for a single trait.

If inst is given, it’s current trait values will be used in place of the class default.

classmethod class_print_help(inst=None)

Get the help string for a single trait and print it.

classmethod class_trait_names(**metadata)

Get a list of all the names of this classes traits.

This method is just like the trait_names() method, but is unbound.

classmethod class_traits(**metadata)

Get a list of all the traits of this class.

This method is just like the traits() method, but is unbound.

The TraitTypes returned don’t know anything about the values that the various HasTrait’s instances are holding.

This follows the same algorithm as traits does and does not allow for any simple way of specifying merely that a metadata name exists, but has any value. This is because get_metadata returns None if a metadata key doesn’t exist.

classes

An instance of a Python list.

clean_logs

A boolean (True, False) trait.

classmethod clear_instance()

unset _instance for this class and singleton parents.

cluster_id

A trait for unicode strings.

config

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

config_file_name

A trait for unicode strings.

config_file_paths

An instance of a Python list.

config_file_specified

A boolean (True, False) trait.

config_files

An instance of a Python list.

copy_config_files

A boolean (True, False) trait.

crash_handler_class

alias of ParallelCrashHandler

created = None

description = "Stop a running IPython cluster\n\nStop a running ipython cluster by its profile name or cluster\ndirectory. Cluster directories are named using the convention\n'profile_<name>'. If your cluster directory is in\nthe cwd or the ipython directory, you can simply refer to it\nusing its profile name, 'ipcluster stop --profile=<profile>`, otherwise\nuse the '--profile-dir' option.\n"

examples = '\nipcluster stop --profile=mycluster # stop a running cluster by profile name\n'

excepthook(etype, evalue, tb)

this is sys.excepthook after init_crashhandler

set self.verbose_crash=True to use our full crashhandler, instead of a regular traceback with a short message (crash_handler_lite)

exit(exit_status=0)

extra_args

An instance of a Python list.

flags

An instance of a Python dict.

flatten_flags()

flatten flags and aliases, so cl-args override as expected.

This prevents issues such as an alias pointing to InteractiveShell, but a config file setting the same trait in TerminalInteraciveShell getting inappropriate priority over the command-line arg.

Only aliases with exactly one descendent in the class list will be promoted.

generate_config_file()

generate default config file from Configurables

get_pid_from_file()

Get the pid from the pid file.

If the pid file doesn’t exist a PIDFileError is raised.

init_config_files()

[optionally] copy default config files into profile dir.

init_crash_handler()

Create a crash handler, typically setting sys.excepthook to it.

init_profile_dir()

initialize the profile dir

initialize(argv=None)

initialize the app

initialize_subcommand(subc, argv=None)

Initialize a subcommand with argv.

classmethod initialized()

Has an instance been created?

classmethod instance(*args, **kwargs)

Returns a global instance of this class.

This method create a new instance if none have previously been created and returns a previously created instance is one already exists.

The arguments and keyword arguments passed to this method are passed on to the __init__() method of the class upon instantiation.

Examples

Create a singleton class using instance, and retrieve it:

>>> from IPython.config.configurable import SingletonConfigurable
>>> class Foo(SingletonConfigurable): pass
>>> foo = Foo.instance()
>>> foo == Foo.instance()
True

Create a subclass that is retrived using the base class instance:

>>> class Bar(SingletonConfigurable): pass
>>> class Bam(Bar): pass
>>> bam = Bam.instance()
>>> bam == Bar.instance()
True

ipython_dir

A trait for unicode strings.

keyvalue_description

A trait for unicode strings.

load_config_file(suppress_errors=True)

Load the config file.

By default, errors in loading config are handled, and a warning printed on screen. For testing, the suppress_errors option is set to False, so errors will make tests fail.

log

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

log_format

A trait for unicode strings.

log_level

An enum that whose value must be in a given sequence.

log_to_file

A boolean (True, False) trait.

log_url

A trait for unicode strings.

loop

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

name = u'ipcluster'

on_trait_change(handler, name=None, remove=False)

Setup a handler to be called when a trait changes.

This is used to setup dynamic notifications of trait changes.

Static handlers can be created by creating methods on a HasTraits subclass with the naming convention ‘_[traitname]_changed’. Thus, to create static handler for the trait ‘a’, create the method _a_changed(self, name, old, new) (fewer arguments can be used, see below).

Parameters :

handler : callable

A callable that is called when a trait changes. Its signature can be handler(), handler(name), handler(name, new) or handler(name, old, new).

name : list, str, None

If None, the handler will apply to all traits. If a list of str, handler will apply to all names in the list. If a str, the handler will apply just to that name.

remove : bool

If False (the default), then install the handler. If True then unintall it.

option_description

A trait for unicode strings.

overwrite

A boolean (True, False) trait.

parse_command_line(argv=None)

Parse the command line arguments.

print_alias_help()

Print the alias part of the help.

print_description()

Print the application description.

print_examples()

Print usage and examples.

This usage string goes at the end of the command line help string and should contain examples of the application’s usage.

print_flag_help()

Print the flag part of the help.

print_help(classes=False)

Print the help for each Configurable class in self.classes.

If classes=False (the default), only flags and aliases are printed.

print_options()

print_subcommands()

Print the subcommand part of the help.

print_version()

Print the version string.

profile

A trait for unicode strings.

reinit_logging()

remove_pid_file()

Remove the pid file.

This should be called at shutdown by registering a callback with reactor.addSystemEventTrigger(). This needs to return None.

signal

An integer trait.

Longs that are unnecessary (<= sys.maxint) are cast to ints.

stage_default_config_file()

auto generate default config file, and stage it into the profile.

start()

Start the app for the stop subcommand.

subapp

A trait whose value must be an instance of a specified class.

The value can also be an instance of a subclass of the specified class.

subcommand_description

A trait for unicode strings.

subcommands

An instance of a Python dict.

to_work_dir()

trait_metadata(traitname, key)

Get metadata values for trait by key.

trait_names(**metadata)

Get a list of all the names of this classes traits.

traits(**metadata)

Get a list of all the traits of this class.

The TraitTypes returned don’t know anything about the values that the various HasTrait’s instances are holding.

This follows the same algorithm as traits does and does not allow for any simple way of specifying merely that a metadata name exists, but has any value. This is because get_metadata returns None if a metadata key doesn’t exist.

update_config(config)

Fire the traits events when the config is updated.

verbose_crash

A boolean (True, False) trait.

version

A trait for unicode strings.

work_dir

A trait for unicode strings.

write_pid_file(overwrite=False)

Create a .pid file in the pid_dir with my pid.

This must be called after pre_construct, which sets self.pid_dir. This raises PIDFileError if the pid file exists already.

Functions

IPython.parallel.apps.ipclusterapp.find_launcher_class(clsname, kind)

Return a launcher for a given clsname and kind.

Parameters :

clsname : str

The full name of the launcher class, either with or without the module path, or an abbreviation (MPI, SSH, SGE, PBS, LSF, WindowsHPC).

kind : str

Either ‘EngineSet’ or ‘Controller’.

IPython.parallel.apps.ipclusterapp.launch_new_instance()

Create and run the IPython cluster.